#include <iostream>
#include <fstream>

using namespace std;

ifstream in("evaluare.in");
ofstream out("evaluare.out");

const int N=100001;
char a[N];
int p=0;
int expresie();
int termen();
int factor();

int expresie()
{
    int sum=termen();
    while(a[p]=='+' || a[p]=='-')
    {
        if(a[p]=='+')
        {
            p++;
          //  cout<<"*"<<sum<<"*";
            sum+=termen();
          //  cout<<"+"<<sum;
        }
        else
        {
            p++;
            sum-=termen();
        }
    }
    return sum;
}
int termen()
{
   // cout<<"OKI"<<" ";
    int prod=factor();
    while(a[p]=='*' || a[p]=='/')
    {
        if(a[p]=='*')
        {
            p++;
            prod*=factor();
        }
        else
        {
            p++;
            prod/=factor();
        }
    }
  //  cout<<"OKI"<<" ";
    return prod;
}

int factor()
{

    int semn=1,val=0;
    while(a[p]=='-')
    {
        p++;
        semn=-semn;
    }

    while(a[p]=='(')
    {
        p++;
        val=expresie();
        p++;

        return semn*val;
    }
    while(a[p]>='0' && a[p]<='9')
    {
        val=val*10+a[p]-'0';
        p++;
    }
   // cout<<semn*val<<" ";
    return semn*val;
}


int main()
{
    in.getline(a,N);
    out<<expresie();
    return 0;
}